Automatic filter corrections in the X-ray analysis of particulate matter

Summary

The penetration of particulates into collection filters can take place in different ways leading to different relations between the numbers of particulates in thin layers within the filter and their depth in the filter. Therefore, the measured intensity must be corrected and this correction is explained for the exponential depth profile as an example.

The correction can be performed with sufficient accuracy by quadratic regression. If a correction program with a quadratic expression such as Spectra 310 is available the correction can be done automatically. The same applies to other non-exponential depth profiles, too.